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1241 lines
38 KiB
1241 lines
38 KiB
/*****************************************************************************
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* rtsp.c: RTSP support for RTP stream output module
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*****************************************************************************
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* Copyright (C) 2003-2004, 2010 VLC authors and VideoLAN
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* Copyright © 2007 Rémi Denis-Courmont
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*
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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* Pierre Ynard
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
|
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* the Free Software Foundation; either version 2.1 of the License, or
|
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc_common.h>
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#include <vlc_sout.h>
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#include <vlc_httpd.h>
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#include <vlc_url.h>
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#include <vlc_charset.h>
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#include <vlc_fs.h>
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#include <vlc_network.h>
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#include <vlc_rand.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <time.h>
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|
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#ifndef _WIN32
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# include <locale.h>
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#endif
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#ifdef HAVE_XLOCALE_H
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# include <xlocale.h>
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#endif
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#include "rtp.h"
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typedef struct rtsp_session_t rtsp_session_t;
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|
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struct rtsp_stream_t
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{
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vlc_mutex_t lock;
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vlc_object_t *owner;
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vod_media_t *vod_media;
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httpd_host_t *host;
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httpd_url_t *url;
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char *psz_path;
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unsigned track_id;
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int sessionc;
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rtsp_session_t **sessionv;
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vlc_tick_t timeout;
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vlc_timer_t timer;
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};
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|
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static int RtspCallback( httpd_callback_sys_t *p_args,
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httpd_client_t *cl, httpd_message_t *answer,
|
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const httpd_message_t *query );
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static int RtspCallbackId( httpd_callback_sys_t *p_args,
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httpd_client_t *cl, httpd_message_t *answer,
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const httpd_message_t *query );
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static void RtspClientDel( rtsp_stream_t *rtsp, rtsp_session_t *session );
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static void RtspTimeOut( void *data );
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rtsp_stream_t *RtspSetup( vlc_object_t *owner, vod_media_t *media,
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const char *path )
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{
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rtsp_stream_t *rtsp = calloc( 1, sizeof( *rtsp ) );
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if( unlikely(rtsp == NULL) )
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return NULL;
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rtsp->owner = owner;
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rtsp->vod_media = media;
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vlc_mutex_init( &rtsp->lock );
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rtsp->timeout = vlc_tick_from_sec(__MAX(0,var_InheritInteger(owner, "rtsp-timeout")));
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if (rtsp->timeout != 0)
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{
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if (vlc_timer_create(&rtsp->timer, RtspTimeOut, rtsp))
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goto error;
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}
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|
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rtsp->psz_path = strdup( (path != NULL) ? path : "/" );
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if( rtsp->psz_path == NULL )
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goto error;
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|
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msg_Dbg( owner, "RTSP stream at %s", rtsp->psz_path );
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rtsp->host = vlc_rtsp_HostNew( VLC_OBJECT(owner) );
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if( rtsp->host == NULL )
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goto error;
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char *user = var_InheritString(owner, "sout-rtsp-user");
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char *pwd = var_InheritString(owner, "sout-rtsp-pwd");
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rtsp->url = httpd_UrlNew( rtsp->host, rtsp->psz_path, user, pwd );
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free(user);
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free(pwd);
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if( rtsp->url == NULL )
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goto error;
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|
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httpd_UrlCatch( rtsp->url, HTTPD_MSG_DESCRIBE, RtspCallback, (void*)rtsp );
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httpd_UrlCatch( rtsp->url, HTTPD_MSG_SETUP, RtspCallback, (void*)rtsp );
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httpd_UrlCatch( rtsp->url, HTTPD_MSG_PLAY, RtspCallback, (void*)rtsp );
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httpd_UrlCatch( rtsp->url, HTTPD_MSG_PAUSE, RtspCallback, (void*)rtsp );
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httpd_UrlCatch( rtsp->url, HTTPD_MSG_GETPARAMETER, RtspCallback,
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(void*)rtsp );
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httpd_UrlCatch( rtsp->url, HTTPD_MSG_TEARDOWN, RtspCallback, (void*)rtsp );
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return rtsp;
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error:
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RtspUnsetup( rtsp );
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return NULL;
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}
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void RtspUnsetup( rtsp_stream_t *rtsp )
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{
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if( rtsp->url )
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httpd_UrlDelete( rtsp->url );
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if( rtsp->host )
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httpd_HostDelete( rtsp->host );
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while( rtsp->sessionc > 0 )
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RtspClientDel( rtsp, rtsp->sessionv[0] );
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if (rtsp->timeout != 0)
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vlc_timer_destroy(rtsp->timer);
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free( rtsp->psz_path );
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vlc_mutex_destroy( &rtsp->lock );
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free( rtsp );
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}
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struct rtsp_stream_id_t
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{
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rtsp_stream_t *stream;
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sout_stream_id_sys_t *sout_id;
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httpd_url_t *url;
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unsigned track_id;
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uint32_t ssrc;
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unsigned clock_rate; /* needed to compute rtptime in RTP-Info */
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int mcast_fd;
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};
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typedef struct rtsp_strack_t rtsp_strack_t;
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/* For unicast streaming */
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struct rtsp_session_t
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{
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rtsp_stream_t *stream;
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uint64_t id;
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vlc_tick_t last_seen; /* for timeouts */
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/* output (id-access) */
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int trackc;
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rtsp_strack_t *trackv;
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};
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/* Unicast session track */
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struct rtsp_strack_t
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{
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rtsp_stream_id_t *id;
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sout_stream_id_sys_t *sout_id;
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int setup_fd; /* socket created by the SETUP request */
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int rtp_fd; /* socket used by the RTP output, when playing */
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uint32_t ssrc;
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uint16_t seq_init;
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};
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static void RtspTrackClose( rtsp_strack_t *tr );
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#define TRACK_PATH_SIZE (sizeof("/trackID=999") - 1)
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char *RtspAppendTrackPath( rtsp_stream_id_t *id, const char *base )
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{
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const char *sep = strlen( base ) > 0 && base[strlen( base ) - 1] == '/' ?
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"" : "/";
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char *url;
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if( asprintf( &url, "%s%strackID=%u", base, sep, id->track_id ) == -1 )
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url = NULL;
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return url;
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}
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rtsp_stream_id_t *RtspAddId( rtsp_stream_t *rtsp, sout_stream_id_sys_t *sid,
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uint32_t ssrc, unsigned clock_rate,
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int mcast_fd)
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{
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if (rtsp->track_id > 999)
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{
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msg_Err(rtsp->owner, "RTSP: too many IDs!");
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return NULL;
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}
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char *urlbuf;
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rtsp_stream_id_t *id = malloc( sizeof( *id ) );
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httpd_url_t *url;
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if( id == NULL )
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return NULL;
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id->stream = rtsp;
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id->sout_id = sid;
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id->track_id = rtsp->track_id;
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id->ssrc = ssrc;
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id->clock_rate = clock_rate;
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id->mcast_fd = mcast_fd;
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urlbuf = RtspAppendTrackPath( id, rtsp->psz_path );
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if( urlbuf == NULL )
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{
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free( id );
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return NULL;
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}
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msg_Dbg( rtsp->owner, "RTSP: adding %s", urlbuf );
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char *user = var_InheritString(rtsp->owner, "sout-rtsp-user");
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char *pwd = var_InheritString(rtsp->owner, "sout-rtsp-pwd");
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url = id->url = httpd_UrlNew( rtsp->host, urlbuf, user, pwd );
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free( user );
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free( pwd );
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free( urlbuf );
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if( url == NULL )
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{
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free( id );
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return NULL;
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}
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httpd_UrlCatch( url, HTTPD_MSG_DESCRIBE, RtspCallbackId, (void *)id );
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httpd_UrlCatch( url, HTTPD_MSG_SETUP, RtspCallbackId, (void *)id );
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httpd_UrlCatch( url, HTTPD_MSG_PLAY, RtspCallbackId, (void *)id );
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httpd_UrlCatch( url, HTTPD_MSG_PAUSE, RtspCallbackId, (void *)id );
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httpd_UrlCatch( url, HTTPD_MSG_GETPARAMETER, RtspCallbackId, (void *)id );
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httpd_UrlCatch( url, HTTPD_MSG_TEARDOWN, RtspCallbackId, (void *)id );
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|
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rtsp->track_id++;
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return id;
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}
|
|
|
|
|
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void RtspDelId( rtsp_stream_t *rtsp, rtsp_stream_id_t *id )
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{
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httpd_UrlDelete( id->url );
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vlc_mutex_lock( &rtsp->lock );
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for( int i = 0; i < rtsp->sessionc; i++ )
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{
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rtsp_session_t *ses = rtsp->sessionv[i];
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for( int j = 0; j < ses->trackc; j++ )
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{
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if( ses->trackv[j].id == id )
|
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{
|
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rtsp_strack_t *tr = ses->trackv + j;
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RtspTrackClose( tr );
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TAB_ERASE(ses->trackc, ses->trackv, j);
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}
|
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}
|
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}
|
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|
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vlc_mutex_unlock( &rtsp->lock );
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free( id );
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}
|
|
|
|
|
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/** rtsp must be locked */
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static void RtspUpdateTimer( rtsp_stream_t *rtsp )
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{
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if (rtsp->timeout == 0)
|
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return;
|
|
|
|
vlc_tick_t timeout = 0;
|
|
for (int i = 0; i < rtsp->sessionc; i++)
|
|
{
|
|
if (timeout == 0 || rtsp->sessionv[i]->last_seen < timeout)
|
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timeout = rtsp->sessionv[i]->last_seen;
|
|
}
|
|
if (timeout != 0)
|
|
{
|
|
timeout += rtsp->timeout;
|
|
vlc_timer_schedule(rtsp->timer, true, timeout, VLC_TIMER_FIRE_ONCE);
|
|
}
|
|
else
|
|
{
|
|
vlc_timer_disarm(rtsp->timer);
|
|
}
|
|
}
|
|
|
|
|
|
static void RtspTimeOut( void *data )
|
|
{
|
|
rtsp_stream_t *rtsp = data;
|
|
|
|
vlc_mutex_lock(&rtsp->lock);
|
|
vlc_tick_t now = vlc_tick_now();
|
|
for (int i = rtsp->sessionc - 1; i >= 0; i--)
|
|
{
|
|
if (rtsp->sessionv[i]->last_seen + rtsp->timeout < now)
|
|
{
|
|
if (rtsp->vod_media != NULL)
|
|
{
|
|
char psz_sesbuf[17];
|
|
snprintf( psz_sesbuf, sizeof( psz_sesbuf ), "%"PRIx64,
|
|
rtsp->sessionv[i]->id );
|
|
vod_stop(rtsp->vod_media, psz_sesbuf);
|
|
}
|
|
RtspClientDel(rtsp, rtsp->sessionv[i]);
|
|
}
|
|
}
|
|
RtspUpdateTimer(rtsp);
|
|
vlc_mutex_unlock(&rtsp->lock);
|
|
}
|
|
|
|
|
|
/** rtsp must be locked */
|
|
static
|
|
rtsp_session_t *RtspClientNew( rtsp_stream_t *rtsp )
|
|
{
|
|
rtsp_session_t *s = malloc( sizeof( *s ) );
|
|
if( s == NULL )
|
|
return NULL;
|
|
|
|
s->stream = rtsp;
|
|
vlc_rand_bytes (&s->id, sizeof (s->id));
|
|
s->trackc = 0;
|
|
s->trackv = NULL;
|
|
|
|
TAB_APPEND( rtsp->sessionc, rtsp->sessionv, s );
|
|
|
|
return s;
|
|
}
|
|
|
|
|
|
/** rtsp must be locked */
|
|
static
|
|
rtsp_session_t *RtspClientGet( rtsp_stream_t *rtsp, const char *name )
|
|
{
|
|
char *end;
|
|
uint64_t id;
|
|
int i;
|
|
|
|
if( name == NULL )
|
|
return NULL;
|
|
|
|
errno = 0;
|
|
id = strtoull( name, &end, 0x10 );
|
|
if( errno || *end )
|
|
return NULL;
|
|
|
|
/* FIXME: use a hash/dictionary */
|
|
for( i = 0; i < rtsp->sessionc; i++ )
|
|
{
|
|
if( rtsp->sessionv[i]->id == id )
|
|
return rtsp->sessionv[i];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/** rtsp must be locked */
|
|
static
|
|
void RtspClientDel( rtsp_stream_t *rtsp, rtsp_session_t *session )
|
|
{
|
|
int i;
|
|
TAB_REMOVE( rtsp->sessionc, rtsp->sessionv, session );
|
|
|
|
for( i = 0; i < session->trackc; i++ )
|
|
RtspTrackClose( &session->trackv[i] );
|
|
|
|
free( session->trackv );
|
|
free( session );
|
|
}
|
|
|
|
|
|
/** rtsp must be locked */
|
|
static void RtspClientAlive( rtsp_session_t *session )
|
|
{
|
|
if (session->stream->timeout == 0)
|
|
return;
|
|
|
|
session->last_seen = vlc_tick_now();
|
|
RtspUpdateTimer(session->stream);
|
|
}
|
|
|
|
static int dup_socket(int oldfd)
|
|
{
|
|
int newfd;
|
|
#ifndef _WIN32
|
|
newfd = vlc_dup(oldfd);
|
|
#else
|
|
WSAPROTOCOL_INFO info;
|
|
WSADuplicateSocket (oldfd, GetCurrentProcessId (), &info);
|
|
newfd = WSASocket (info.iAddressFamily, info.iSocketType,
|
|
info.iProtocol, &info, 0, 0);
|
|
#endif
|
|
return newfd;
|
|
}
|
|
|
|
/* Attach a starting VoD RTP id to its RTSP track, and let it
|
|
* initialize with the parameters of the SETUP request */
|
|
int RtspTrackAttach( rtsp_stream_t *rtsp, const char *name,
|
|
rtsp_stream_id_t *id, sout_stream_id_sys_t *sout_id,
|
|
uint32_t *ssrc, uint16_t *seq_init )
|
|
{
|
|
int val = VLC_EGENERIC;
|
|
rtsp_session_t *session;
|
|
|
|
vlc_mutex_lock(&rtsp->lock);
|
|
session = RtspClientGet(rtsp, name);
|
|
|
|
if (session == NULL)
|
|
goto out;
|
|
|
|
rtsp_strack_t *tr = NULL;
|
|
for (int i = 0; i < session->trackc; i++)
|
|
{
|
|
if (session->trackv[i].id == id)
|
|
{
|
|
tr = session->trackv + i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (tr != NULL)
|
|
{
|
|
tr->sout_id = sout_id;
|
|
tr->rtp_fd = dup_socket(tr->setup_fd);
|
|
}
|
|
else
|
|
{
|
|
/* The track was not SETUP. We still create one because we'll
|
|
* need the sout_id if we set it up later. */
|
|
rtsp_strack_t track = { .id = id, .sout_id = sout_id,
|
|
.setup_fd = -1, .rtp_fd = -1 };
|
|
vlc_rand_bytes (&track.seq_init, sizeof (track.seq_init));
|
|
vlc_rand_bytes (&track.ssrc, sizeof (track.ssrc));
|
|
|
|
TAB_APPEND(session->trackc, session->trackv, track);
|
|
tr = session->trackv + session->trackc - 1;
|
|
}
|
|
|
|
*ssrc = ntohl(tr->ssrc);
|
|
*seq_init = tr->seq_init;
|
|
|
|
if (tr->rtp_fd != -1)
|
|
{
|
|
uint16_t seq;
|
|
rtp_add_sink(tr->sout_id, tr->rtp_fd, false, &seq);
|
|
/* To avoid race conditions, sout_id->i_seq_sent_next must
|
|
* be set here and now. Make sure the caller did its job
|
|
* properly when passing seq_init. */
|
|
assert(tr->seq_init == seq);
|
|
}
|
|
|
|
val = VLC_SUCCESS;
|
|
out:
|
|
vlc_mutex_unlock(&rtsp->lock);
|
|
return val;
|
|
}
|
|
|
|
|
|
/* Remove references to the RTP id when it is stopped */
|
|
void RtspTrackDetach( rtsp_stream_t *rtsp, const char *name,
|
|
sout_stream_id_sys_t *sout_id )
|
|
{
|
|
rtsp_session_t *session;
|
|
|
|
vlc_mutex_lock(&rtsp->lock);
|
|
session = RtspClientGet(rtsp, name);
|
|
|
|
if (session == NULL)
|
|
goto out;
|
|
|
|
for (int i = 0; i < session->trackc; i++)
|
|
{
|
|
rtsp_strack_t *tr = session->trackv + i;
|
|
if (tr->sout_id == sout_id)
|
|
{
|
|
if (tr->setup_fd == -1)
|
|
{
|
|
/* No (more) SETUP information: better get rid of the
|
|
* track so that we can have new random ssrc and
|
|
* seq_init next time. */
|
|
TAB_ERASE(session->trackc, session->trackv, i);
|
|
break;
|
|
}
|
|
/* We keep the SETUP information of the track, but stop it */
|
|
if (tr->rtp_fd != -1)
|
|
{
|
|
rtp_del_sink(tr->sout_id, tr->rtp_fd);
|
|
tr->rtp_fd = -1;
|
|
}
|
|
tr->sout_id = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
vlc_mutex_unlock(&rtsp->lock);
|
|
}
|
|
|
|
|
|
/** rtsp must be locked */
|
|
static void RtspTrackClose( rtsp_strack_t *tr )
|
|
{
|
|
if (tr->setup_fd != -1)
|
|
{
|
|
if (tr->rtp_fd != -1)
|
|
{
|
|
rtp_del_sink(tr->sout_id, tr->rtp_fd);
|
|
tr->rtp_fd = -1;
|
|
}
|
|
net_Close(tr->setup_fd);
|
|
tr->setup_fd = -1;
|
|
}
|
|
}
|
|
|
|
|
|
/** Finds the next transport choice */
|
|
static inline const char *transport_next( const char *str )
|
|
{
|
|
/* Looks for comma */
|
|
str = strchr( str, ',' );
|
|
if( str == NULL )
|
|
return NULL; /* No more transport options */
|
|
|
|
str++; /* skips comma */
|
|
while( strchr( "\r\n\t ", *str ) )
|
|
str++;
|
|
|
|
return (*str) ? str : NULL;
|
|
}
|
|
|
|
|
|
/** Finds the next transport parameter */
|
|
static inline const char *parameter_next( const char *str )
|
|
{
|
|
while( strchr( ",;", *str ) == NULL )
|
|
str++;
|
|
|
|
return (*str == ';') ? (str + 1) : NULL;
|
|
}
|
|
|
|
|
|
static vlc_tick_t ParseNPT (const char *str)
|
|
{
|
|
locale_t loc = newlocale (LC_NUMERIC_MASK, "C", NULL);
|
|
locale_t oldloc = uselocale (loc);
|
|
unsigned hour, min;
|
|
float sec;
|
|
|
|
if (sscanf (str, "%u:%u:%f", &hour, &min, &sec) == 3)
|
|
sec += ((hour * 60) + min) * 60;
|
|
else
|
|
if (sscanf (str, "%f", &sec) != 1)
|
|
sec = -1;
|
|
|
|
if (loc != (locale_t)0)
|
|
{
|
|
uselocale (oldloc);
|
|
freelocale (loc);
|
|
}
|
|
return sec < 0 ? -1 : vlc_tick_from_sec( sec );
|
|
}
|
|
|
|
|
|
/** RTSP requests handler
|
|
* @param id selected track for non-aggregate URLs,
|
|
* NULL for aggregate URLs
|
|
*/
|
|
static int RtspHandler( rtsp_stream_t *rtsp, rtsp_stream_id_t *id,
|
|
httpd_client_t *cl,
|
|
httpd_message_t *answer,
|
|
const httpd_message_t *query )
|
|
{
|
|
vlc_object_t *owner = rtsp->owner;
|
|
char psz_sesbuf[17];
|
|
const char *psz_session = NULL, *psz;
|
|
char control[sizeof("rtsp://[]:12345") + NI_MAXNUMERICHOST
|
|
+ strlen( rtsp->psz_path )];
|
|
bool vod = rtsp->vod_media != NULL;
|
|
time_t now;
|
|
|
|
time (&now);
|
|
|
|
if( answer == NULL || query == NULL || cl == NULL )
|
|
return VLC_SUCCESS;
|
|
else
|
|
{
|
|
/* Build self-referential control URL */
|
|
char ip[NI_MAXNUMERICHOST], *ptr;
|
|
int port;
|
|
|
|
httpd_ServerIP( cl, ip, &port );
|
|
ptr = strchr( ip, '%' );
|
|
if( ptr != NULL )
|
|
*ptr = '\0';
|
|
|
|
if( strchr( ip, ':' ) != NULL )
|
|
sprintf( control, "rtsp://[%s]:%d%s", ip, port, rtsp->psz_path );
|
|
else
|
|
sprintf( control, "rtsp://%s:%d%s", ip, port, rtsp->psz_path );
|
|
}
|
|
|
|
/* */
|
|
answer->i_proto = HTTPD_PROTO_RTSP;
|
|
answer->i_version= 0;
|
|
answer->i_type = HTTPD_MSG_ANSWER;
|
|
answer->i_body = 0;
|
|
answer->p_body = NULL;
|
|
|
|
httpd_MsgAdd( answer, "Server", "VLC/%s", VERSION );
|
|
|
|
/* Date: is always allowed, and sometimes mandatory with RTSP/2.0. */
|
|
struct tm ut;
|
|
if (gmtime_r (&now, &ut) != NULL)
|
|
{ /* RFC1123 format, GMT is mandatory */
|
|
static const char wdays[7][4] = {
|
|
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
|
|
static const char mons[12][4] = {
|
|
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
|
|
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
|
|
httpd_MsgAdd (answer, "Date", "%s, %02u %s %04u %02u:%02u:%02u GMT",
|
|
wdays[ut.tm_wday], ut.tm_mday, mons[ut.tm_mon],
|
|
1900 + ut.tm_year, ut.tm_hour, ut.tm_min, ut.tm_sec);
|
|
}
|
|
|
|
if( query->i_proto != HTTPD_PROTO_RTSP )
|
|
{
|
|
answer->i_status = 505;
|
|
}
|
|
else
|
|
if( httpd_MsgGet( query, "Require" ) != NULL )
|
|
{
|
|
answer->i_status = 551;
|
|
httpd_MsgAdd( answer, "Unsupported", "%s",
|
|
httpd_MsgGet( query, "Require" ) );
|
|
}
|
|
else
|
|
switch( query->i_type )
|
|
{
|
|
case HTTPD_MSG_DESCRIBE:
|
|
{ /* Aggregate-only */
|
|
if( id != NULL )
|
|
{
|
|
answer->i_status = 460;
|
|
break;
|
|
}
|
|
|
|
answer->i_status = 200;
|
|
httpd_MsgAdd( answer, "Content-Type", "%s", "application/sdp" );
|
|
httpd_MsgAdd( answer, "Content-Base", "%s", control );
|
|
|
|
answer->p_body = (uint8_t *) ( vod ?
|
|
SDPGenerateVoD( rtsp->vod_media, control ) :
|
|
SDPGenerate( (sout_stream_t *)owner, control ) );
|
|
if( answer->p_body != NULL )
|
|
answer->i_body = strlen( (char *)answer->p_body );
|
|
else
|
|
answer->i_status = 500;
|
|
break;
|
|
}
|
|
|
|
case HTTPD_MSG_SETUP:
|
|
/* Non-aggregate-only */
|
|
if( id == NULL )
|
|
{
|
|
answer->i_status = 459;
|
|
break;
|
|
}
|
|
|
|
psz_session = httpd_MsgGet( query, "Session" );
|
|
answer->i_status = 461;
|
|
|
|
for( const char *tpt = httpd_MsgGet( query, "Transport" );
|
|
tpt != NULL;
|
|
tpt = transport_next( tpt ) )
|
|
{
|
|
bool b_multicast = true, b_unsupp = false;
|
|
bool b_multicast_port_set = false;
|
|
unsigned loport = 5004, hiport; /* from RFC3551 */
|
|
unsigned mloport = 5004, mhiport = mloport + 1;
|
|
|
|
/* Check transport protocol. */
|
|
/* Currently, we only support RTP/AVP over UDP */
|
|
if( strncmp( tpt, "RTP/AVP", 7 ) )
|
|
continue;
|
|
tpt += 7;
|
|
if( strncmp( tpt, "/UDP", 4 ) == 0 )
|
|
tpt += 4;
|
|
if( strchr( ";,", *tpt ) == NULL )
|
|
continue;
|
|
|
|
/* Parse transport options */
|
|
for( const char *opt = parameter_next( tpt );
|
|
opt != NULL;
|
|
opt = parameter_next( opt ) )
|
|
{
|
|
if( strncmp( opt, "multicast", 9 ) == 0)
|
|
b_multicast = true;
|
|
else
|
|
if( strncmp( opt, "unicast", 7 ) == 0 )
|
|
b_multicast = false;
|
|
else
|
|
if( sscanf( opt, "client_port=%u-%u", &loport, &hiport )
|
|
== 2 )
|
|
;
|
|
else
|
|
if( sscanf( opt, "port=%u-%u", &mloport, &mhiport )
|
|
== 2 )
|
|
b_multicast_port_set = true;
|
|
else
|
|
if( strncmp( opt, "mode=", 5 ) == 0 )
|
|
{
|
|
if( strncasecmp( opt + 5, "play", 4 )
|
|
&& strncasecmp( opt + 5, "\"PLAY\"", 6 ) )
|
|
{
|
|
/* Not playing?! */
|
|
b_unsupp = true;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
if( strncmp( opt,"destination=", 12 ) == 0 )
|
|
{
|
|
answer->i_status = 403;
|
|
b_unsupp = true;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Every other option is unsupported:
|
|
*
|
|
* "source" and "append" are invalid (server-only);
|
|
* "ssrc" also (as clarified per RFC2326bis).
|
|
*
|
|
* For multicast, "layers", "ttl" are set by the
|
|
* stream output configuration.
|
|
*
|
|
* For unicast, we want to decide "server_port" values.
|
|
*
|
|
* "interleaved" is not implemented.
|
|
*/
|
|
b_unsupp = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if( b_unsupp )
|
|
continue;
|
|
|
|
if( b_multicast )
|
|
{
|
|
char dst[NI_MAXNUMERICHOST];
|
|
int dport, ttl;
|
|
if( id->mcast_fd == -1 )
|
|
continue;
|
|
|
|
net_GetPeerAddress(id->mcast_fd, dst, &dport);
|
|
|
|
/* Checking for multicast port override */
|
|
if( b_multicast_port_set
|
|
&& ((unsigned)dport != mloport
|
|
|| (unsigned)dport + 1 != mhiport))
|
|
{
|
|
answer->i_status = 551;
|
|
continue;
|
|
}
|
|
|
|
ttl = var_InheritInteger(owner, "ttl");
|
|
if (ttl <= 0)
|
|
/* FIXME: the TTL is left to the OS default, we can
|
|
* only guess that it's 1. */
|
|
ttl = 1;
|
|
|
|
if( psz_session == NULL )
|
|
{
|
|
/* Create a dummy session ID */
|
|
snprintf( psz_sesbuf, sizeof( psz_sesbuf ), "%lu",
|
|
vlc_mrand48() );
|
|
psz_session = psz_sesbuf;
|
|
}
|
|
answer->i_status = 200;
|
|
|
|
httpd_MsgAdd( answer, "Transport",
|
|
"RTP/AVP/UDP;destination=%s;port=%u-%u;"
|
|
"ttl=%d;mode=play",
|
|
dst, dport, dport + 1, ttl );
|
|
/* FIXME: this doesn't work with RTP + RTCP mux */
|
|
}
|
|
else
|
|
{
|
|
char ip[NI_MAXNUMERICHOST], src[NI_MAXNUMERICHOST];
|
|
rtsp_session_t *ses = NULL;
|
|
int fd, sport;
|
|
uint32_t ssrc;
|
|
|
|
if( httpd_ClientIP( cl, ip, NULL ) == NULL )
|
|
{
|
|
answer->i_status = 500;
|
|
continue;
|
|
}
|
|
|
|
fd = net_ConnectDgram( owner, ip, loport, -1,
|
|
IPPROTO_UDP );
|
|
if( fd == -1 )
|
|
{
|
|
msg_Err( owner,
|
|
"cannot create RTP socket for %s port %u",
|
|
ip, loport );
|
|
answer->i_status = 500;
|
|
continue;
|
|
}
|
|
|
|
/* Ignore any unexpected incoming packet */
|
|
setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &(int){ 0 },
|
|
sizeof (int));
|
|
net_GetSockAddress( fd, src, &sport );
|
|
|
|
vlc_mutex_lock( &rtsp->lock );
|
|
if( psz_session == NULL )
|
|
{
|
|
ses = RtspClientNew( rtsp );
|
|
snprintf( psz_sesbuf, sizeof( psz_sesbuf ), "%"PRIx64,
|
|
ses->id );
|
|
psz_session = psz_sesbuf;
|
|
}
|
|
else
|
|
{
|
|
ses = RtspClientGet( rtsp, psz_session );
|
|
if( ses == NULL )
|
|
{
|
|
answer->i_status = 454;
|
|
vlc_mutex_unlock( &rtsp->lock );
|
|
net_Close( fd );
|
|
continue;
|
|
}
|
|
}
|
|
RtspClientAlive(ses);
|
|
|
|
rtsp_strack_t *tr = NULL;
|
|
for (int i = 0; i < ses->trackc; i++)
|
|
{
|
|
if (ses->trackv[i].id == id)
|
|
{
|
|
tr = ses->trackv + i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (tr == NULL)
|
|
{
|
|
/* Set up a new track */
|
|
rtsp_strack_t track = { .id = id,
|
|
.sout_id = id->sout_id,
|
|
.setup_fd = fd,
|
|
.rtp_fd = -1 };
|
|
|
|
if (vod)
|
|
{
|
|
vlc_rand_bytes (&track.seq_init,
|
|
sizeof (track.seq_init));
|
|
vlc_rand_bytes (&track.ssrc, sizeof (track.ssrc));
|
|
ssrc = track.ssrc;
|
|
}
|
|
else
|
|
ssrc = id->ssrc;
|
|
|
|
TAB_APPEND(ses->trackc, ses->trackv, track);
|
|
}
|
|
else if (tr->setup_fd == -1)
|
|
{
|
|
/* The track was not SETUP, but it exists
|
|
* because there is a sout_id running for it */
|
|
tr->setup_fd = fd;
|
|
ssrc = tr->ssrc;
|
|
}
|
|
else
|
|
{
|
|
/* The track is already set up, and we don't
|
|
* support changing the transport parameters on
|
|
* the fly */
|
|
vlc_mutex_unlock( &rtsp->lock );
|
|
answer->i_status = 455;
|
|
net_Close( fd );
|
|
break;
|
|
}
|
|
vlc_mutex_unlock( &rtsp->lock );
|
|
|
|
httpd_ServerIP( cl, ip, NULL );
|
|
|
|
/* Specify source IP only if it is different from the
|
|
* RTSP control connection server address */
|
|
if( strcmp( src, ip ) )
|
|
{
|
|
char *ptr = strchr( src, '%' );
|
|
if( ptr != NULL ) *ptr = '\0'; /* remove scope ID */
|
|
}
|
|
else
|
|
src[0] = '\0';
|
|
|
|
httpd_MsgAdd( answer, "Transport",
|
|
"RTP/AVP/UDP;unicast%s%s;"
|
|
"client_port=%u-%u;server_port=%u-%u;"
|
|
"ssrc=%08X;mode=play",
|
|
src[0] ? ";source=" : "", src,
|
|
loport, loport + 1, sport, sport + 1, ssrc );
|
|
|
|
answer->i_status = 200;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case HTTPD_MSG_PLAY:
|
|
{
|
|
rtsp_session_t *ses;
|
|
answer->i_status = 200;
|
|
|
|
psz_session = httpd_MsgGet( query, "Session" );
|
|
vlc_tick_t start = -1, end = -1, npt;
|
|
const char *range = httpd_MsgGet (query, "Range");
|
|
if (range != NULL)
|
|
{
|
|
if (strncmp (range, "npt=", 4))
|
|
{
|
|
answer->i_status = 501;
|
|
break;
|
|
}
|
|
|
|
start = ParseNPT (range + 4);
|
|
range = strchr(range, '-');
|
|
if (range != NULL && *(range + 1))
|
|
end = ParseNPT (range + 1);
|
|
|
|
if (end >= 0 && end < start)
|
|
{
|
|
answer->i_status = 457;
|
|
break;
|
|
}
|
|
|
|
if (vod)
|
|
{
|
|
if (vod_check_range(rtsp->vod_media, psz_session,
|
|
start, end) != VLC_SUCCESS)
|
|
{
|
|
answer->i_status = 457;
|
|
break;
|
|
}
|
|
}
|
|
/* We accept start times of 0 even for broadcast streams
|
|
* that already started */
|
|
else if (start > 0 || end >= 0)
|
|
{
|
|
answer->i_status = 456;
|
|
break;
|
|
}
|
|
}
|
|
vlc_mutex_lock( &rtsp->lock );
|
|
ses = RtspClientGet( rtsp, psz_session );
|
|
if( ses != NULL )
|
|
{
|
|
char info[ses->trackc * ( strlen( control ) + TRACK_PATH_SIZE
|
|
+ sizeof("url=;seq=65535;rtptime=4294967295, ")
|
|
- 1 ) + 1];
|
|
size_t infolen = 0;
|
|
RtspClientAlive(ses);
|
|
|
|
sout_stream_id_sys_t *sout_id = NULL;
|
|
if (vod)
|
|
{
|
|
/* We don't keep a reference to the sout_stream_t,
|
|
* so we check if a sout_id is available instead. */
|
|
for (int i = 0; i < ses->trackc; i++)
|
|
{
|
|
sout_id = ses->trackv[i].sout_id;
|
|
if (sout_id != NULL)
|
|
break;
|
|
}
|
|
}
|
|
vlc_tick_t ts = rtp_get_ts(vod ? NULL : (sout_stream_t *)owner,
|
|
sout_id, rtsp->vod_media, psz_session,
|
|
vod ? NULL : &npt);
|
|
|
|
for( int i = 0; i < ses->trackc; i++ )
|
|
{
|
|
rtsp_strack_t *tr = ses->trackv + i;
|
|
if( ( id == NULL ) || ( tr->id == id ) )
|
|
{
|
|
if (tr->setup_fd == -1)
|
|
/* Track not SETUP */
|
|
continue;
|
|
|
|
uint16_t seq;
|
|
if( tr->rtp_fd == -1 )
|
|
{
|
|
/* Track not PLAYing yet */
|
|
if (tr->sout_id == NULL)
|
|
/* Instance not running yet (VoD) */
|
|
seq = tr->seq_init;
|
|
else
|
|
{
|
|
/* Instance running, add a sink to it */
|
|
tr->rtp_fd = dup_socket(tr->setup_fd);
|
|
if (tr->rtp_fd == -1)
|
|
continue;
|
|
|
|
rtp_add_sink( tr->sout_id, tr->rtp_fd,
|
|
false, &seq );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Track already playing */
|
|
assert( tr->sout_id != NULL );
|
|
seq = rtp_get_seq( tr->sout_id );
|
|
}
|
|
char *url = RtspAppendTrackPath( tr->id, control );
|
|
infolen += sprintf( info + infolen,
|
|
"url=%s;seq=%u;rtptime=%u, ",
|
|
url != NULL ? url : "", seq,
|
|
rtp_compute_ts( tr->id->clock_rate, ts ) );
|
|
free( url );
|
|
}
|
|
}
|
|
if( infolen > 0 )
|
|
{
|
|
info[infolen - 2] = '\0'; /* remove trailing ", " */
|
|
httpd_MsgAdd( answer, "RTP-Info", "%s", info );
|
|
}
|
|
}
|
|
vlc_mutex_unlock( &rtsp->lock );
|
|
|
|
if (ses != NULL)
|
|
{
|
|
if (vod)
|
|
{
|
|
vod_play(rtsp->vod_media, psz_session, &start, end);
|
|
npt = start;
|
|
}
|
|
|
|
double f_npt = secf_from_vlc_tick(npt);
|
|
httpd_MsgAdd( answer, "Range", "npt=%f-", f_npt );
|
|
}
|
|
|
|
if( httpd_MsgGet( query, "Scale" ) != NULL )
|
|
httpd_MsgAdd( answer, "Scale", "1." );
|
|
break;
|
|
}
|
|
|
|
case HTTPD_MSG_PAUSE:
|
|
{
|
|
if (id == NULL && !vod)
|
|
{
|
|
answer->i_status = 405;
|
|
httpd_MsgAdd( answer, "Allow",
|
|
"DESCRIBE, TEARDOWN, PLAY, GET_PARAMETER" );
|
|
break;
|
|
}
|
|
|
|
rtsp_session_t *ses;
|
|
answer->i_status = 200;
|
|
psz_session = httpd_MsgGet( query, "Session" );
|
|
vlc_mutex_lock( &rtsp->lock );
|
|
ses = RtspClientGet( rtsp, psz_session );
|
|
if (ses != NULL)
|
|
{
|
|
if (id != NULL) /* "Mute" the selected track */
|
|
{
|
|
bool found = false;
|
|
for (int i = 0; i < ses->trackc; i++)
|
|
{
|
|
rtsp_strack_t *tr = ses->trackv + i;;
|
|
if (tr->id == id)
|
|
{
|
|
if (tr->setup_fd == -1)
|
|
break;
|
|
|
|
found = true;
|
|
if (tr->rtp_fd != -1)
|
|
{
|
|
rtp_del_sink(tr->sout_id, tr->rtp_fd);
|
|
tr->rtp_fd = -1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!found)
|
|
answer->i_status = 455;
|
|
}
|
|
RtspClientAlive(ses);
|
|
}
|
|
vlc_mutex_unlock( &rtsp->lock );
|
|
|
|
if (ses != NULL && id == NULL)
|
|
{
|
|
assert(vod);
|
|
vlc_tick_t npt = 0;
|
|
vod_pause(rtsp->vod_media, psz_session, &npt);
|
|
double f_npt = secf_from_vlc_tick(npt);
|
|
httpd_MsgAdd( answer, "Range", "npt=%f-", f_npt );
|
|
}
|
|
break;
|
|
}
|
|
|
|
case HTTPD_MSG_GETPARAMETER:
|
|
{
|
|
if( query->i_body > 0 )
|
|
{
|
|
answer->i_status = 451;
|
|
break;
|
|
}
|
|
|
|
psz_session = httpd_MsgGet( query, "Session" );
|
|
answer->i_status = 200;
|
|
vlc_mutex_lock( &rtsp->lock );
|
|
rtsp_session_t *ses = RtspClientGet( rtsp, psz_session );
|
|
if (ses != NULL)
|
|
RtspClientAlive(ses);
|
|
vlc_mutex_unlock( &rtsp->lock );
|
|
break;
|
|
}
|
|
|
|
case HTTPD_MSG_TEARDOWN:
|
|
{
|
|
rtsp_session_t *ses;
|
|
|
|
answer->i_status = 200;
|
|
|
|
psz_session = httpd_MsgGet( query, "Session" );
|
|
|
|
vlc_mutex_lock( &rtsp->lock );
|
|
ses = RtspClientGet( rtsp, psz_session );
|
|
if( ses != NULL )
|
|
{
|
|
if( id == NULL ) /* Delete the entire session */
|
|
{
|
|
RtspClientDel( rtsp, ses );
|
|
if (vod)
|
|
vod_stop(rtsp->vod_media, psz_session);
|
|
RtspUpdateTimer(rtsp);
|
|
}
|
|
else /* Delete one track from the session */
|
|
{
|
|
for( int i = 0; i < ses->trackc; i++ )
|
|
{
|
|
if( ses->trackv[i].id == id )
|
|
{
|
|
RtspTrackClose( &ses->trackv[i] );
|
|
/* Keep VoD tracks whose instance is still
|
|
* running */
|
|
if (!(vod && ses->trackv[i].sout_id != NULL))
|
|
TAB_ERASE(ses->trackc, ses->trackv, i);
|
|
}
|
|
}
|
|
RtspClientAlive(ses);
|
|
}
|
|
}
|
|
vlc_mutex_unlock( &rtsp->lock );
|
|
break;
|
|
}
|
|
|
|
default:
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
if( psz_session )
|
|
{
|
|
if (rtsp->timeout != 0)
|
|
httpd_MsgAdd( answer, "Session", "%s;timeout=%" PRIu64, psz_session,
|
|
SEC_FROM_VLC_TICK(rtsp->timeout) );
|
|
else
|
|
httpd_MsgAdd( answer, "Session", "%s", psz_session );
|
|
}
|
|
|
|
httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
|
|
httpd_MsgAdd( answer, "Cache-Control", "no-cache" );
|
|
|
|
psz = httpd_MsgGet( query, "Cseq" );
|
|
if( psz != NULL )
|
|
httpd_MsgAdd( answer, "Cseq", "%s", psz );
|
|
psz = httpd_MsgGet( query, "Timestamp" );
|
|
if( psz != NULL )
|
|
httpd_MsgAdd( answer, "Timestamp", "%s", psz );
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
|
|
/** Aggregate RTSP callback */
|
|
static int RtspCallback( httpd_callback_sys_t *p_args,
|
|
httpd_client_t *cl,
|
|
httpd_message_t *answer,
|
|
const httpd_message_t *query )
|
|
{
|
|
return RtspHandler( (rtsp_stream_t *)p_args, NULL, cl, answer, query );
|
|
}
|
|
|
|
|
|
/** Non-aggregate RTSP callback */
|
|
static int RtspCallbackId( httpd_callback_sys_t *p_args,
|
|
httpd_client_t *cl,
|
|
httpd_message_t *answer,
|
|
const httpd_message_t *query )
|
|
{
|
|
rtsp_stream_id_t *id = (rtsp_stream_id_t *)p_args;
|
|
return RtspHandler( id->stream, id, cl, answer, query );
|
|
}
|
|
|